Adenophorea

Adenophorea or Aphasmidia was a class of nematodes (roundworms). It has been by and large abandoned by modern taxonomy, because there is strong evidence for it being a motley paraphyletic group of unrelated lineages of roundworms.[1]

Characteristics supposed to distinguish Adenophorea are:

amphids always post-labial, variable shape, pore-like to elaborate

deirids are not seen

phasmids are generally absent

hypodermal glands present (excretory?) uninucleate

simple non-tubular excretory system when present

three caudal glands commonly opening through a spinneret at the tail tip

male generally has two testes

caudal alae are rare

male with supplement glands in a single ventro-median row

sensory papillae in cephalic region and along the body

generally there are five esophageal glands

marine, freshwater, terrestrial

As it seems, a number of these traits are plesiomorphic, and thus unsuitable to discern relationships.